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51670404 = 22321435289
BaseRepresentation
bin1100010100011…
…0110110000100
310121020010110200
43011012312010
5101211423104
65043250500
71165122402
oct305066604
9117203420
1051670404
1127191815
1215379a30
13a921806
146c10472
154809b39
hex3146d84

51670404 has 18 divisors (see below), whose sum is σ = 130611390. Its totient is φ = 17223456.

The previous prime is 51670393. The next prime is 51670417. The reversal of 51670404 is 40407615.

It can be written as a sum of positive squares in only one way, i.e., 42380100 + 9290304 = 6510^2 + 3048^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 717609 + ... + 717680.

Almost surely, 251670404 is an apocalyptic number.

It is an amenable number.

51670404 is an abundant number, since it is smaller than the sum of its proper divisors (78940986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51670404 is a wasteful number, since it uses less digits than its factorization.

51670404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435299 (or 1435294 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 51670404 is about 7188.2128516064. The cubic root of 51670404 is about 372.4608405902.

The spelling of 51670404 in words is "fifty-one million, six hundred seventy thousand, four hundred four".

Divisors: 1 2 3 4 6 9 12 18 36 1435289 2870578 4305867 5741156 8611734 12917601 17223468 25835202 51670404